Printing-press.



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APPLIOATION FILED AUG. 25, 1902.

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PATENTED JUNE- 23, 1903.

G. W. PROUTY.

PRINTING PRESS.

APPLIUATION FILED AUG. 2s, 1902.

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No MODEL.

dual Y Invention George Wlrouty,

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UNITED STATES 4@PATENT Patented June 23, 1903.

UEEICE.

GEORGE w. PROUTY, OE BOSTON, MASSACHUSETTS, ASSIGNOR, RY DIRECT ANDMESNE ASSIGNMENTS, To IMPERIALPRESS COMPANY, OE EITTERY, MAINE, ANDBOSTON, MASSACHUSETTS, A CORPORATION OE MAINE.

PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 731,497, dated June2.3, 1903. Application led August 25, 1902. Serial No. 120,884. (Nomodel.)

.To all whom it may concern:

Be it known that I, GEORGE W. PROUTY, of Boston,in the county of Suiolkand State of .Massachusetts,have invented certain new and usefulImprovements in Printing-Presses, of which the followin'g,taken inconnection with the accompanying drawings,is a specification. Myinvention relates to printing-presses, and particularly to that class ofpresses corn- Io monly termed job-presses; andit consists in certainnovel features of construction, arrangement, and` combination of parts,which will be readily understood by reference to the description of theaccompanying drawings, and to the claims hereto appended, and in whichmy invention is clearly pointed out.

Figure 1 of the drawings is a front elevation ofa press embodying myinvention. Fig. 2 is a side elevation with the several parts in zo thepositions which they assume when the impression is on. Fig. 3 is a rearelevation of the same. Fig. 4 is an elevation looking at the same sideas Fig. v2, but with the parts in the positions they assume when theimpression is off and the platen is at a standstill at the extreme ofits backward movement. Fig. 5 is a section of the platen and yoke online A A on Fig. 4, and Figs. 6 and 7 are respectively an inverted planand a sec- 3o tional elevation of the forked lever 10.

In the drawings, 1 representsY the main frame of the machine, and 2 isthe type-bed formed integral with said frame and to which the type-for1nis secured in a Well-known manner. In suitable bearings in the frame lis mounted the driving-shaft 3, to one end of which is Secured thedriving-pulley 4 and a iiy-wheel, (not shown,) and intermediate of itsends Aand within said frame said shaft has 4o secured thereon twopinions 5 5, the teeth of which engage with and impart motion to thespur gear-wheels 6 6, the hubs of which are mounted in bearings in theframe 1, said gears being connected together by a crank-pin 7,

which has mounted thereon one end ofa pit- 'man 8, the opposite end ofwhich is pivoted at 9 to the lever 10, fulcrumed upon and Inovable aboutthe fixed rod 11, said lever having pivoted thereto at 12 one end of thelink 13,

the opposite end of which is pivoted to one arm of the elbow-lever 14,mounted upon the `shaft 15, as shown.

The upper arm of the elbow-lever 14 terminates in a long tubular hub 16,which extends transversely of the machine and has mounted therein theshaft 17, on each end of which is mounted one end of a draw-bar 18, theopposite ends of which are mounted on the ends of the shaft 19, uponwhich the platen-yoke 2O is mounted, so as to be revoluble thereon. Sofar as hereinbefore described the construction shown is well known.Y

I will now proceed to describe the Subject- Inatter of my presentinvention.

The shaft 19 has mounted on each end 65 thereof,between the draw-bars 18and the ends of the yoke 20, one end of a radius-rod 21, the other endof which is firmly Secured to the end of the shaft 22, which is mountedin suitable bearings in the frame 1. The yoke' 7o 20 also has pivoted toears projecting from its front edge in line with the connection of thedraw-bars and the radius-arms 21 the upper end of the shorter radius armor link 23, the other end of which is pivotally connected by aneccentricepin 25 to the stand 24, secured upon the front wall of theframe 1, said eccentric havingmounted onone end.thereof the slotted arm26, by means of vwhich and the clamping-screw 27 said eccentric may bemoved about the axis of its bearings to adjust the platen as desired. y

The shafts 15 and 17 have mounted thereon just inside of the draw-bars18 the iukingrollerframes 28, which carry the inking-rolls and theiraccessories of well-known construcf tion.

The type-bed 2 has mounted thereon the stand 29, which supports thedistributingdisk 30, and thefountain 3l, ofwell-known construction. Thelever 10 is fulcrumed upon the rod 1l by means of a hole 32, throughwhich said rod passes, said hole being slotted or made longer in thedirection of the length of said lever than the diameter of said rod, 95so that said lever is capable of being moved endwise to a limited extentduring a certain portion of its vibration.

, the upwardly-curved portion of the cam-slot' The rod 1l has firmlysecured thereon in a fixed or non-revoluble position the cam-plate 33,which has formed therein the cam-slot 34, the lower portion of which isconcentric with the axis of its supporting-rod and the upper portion iscurved outward to a greater' distance from said axis than saidconcentric portion, as shown in Figs. 2 and 3.

The lever 10 is forked at both its upper and lower ends, the two sideportions being connected together by the curved web 35 and the ribs 36,and has set therein in a fixed position the pin 37, which extendsthrough the two arms of the lower or outer fork and through the cam-slot34 in the plate 33, and has mounted thereon within said slot the truck38, which when in the concentric portion of said slot 34 will maintainthe lever 10 in the position with the inner end of the slotted hole 32in its fulcrum and in contact with the rod 11, as shown in Fig. 2, whichcondition is maintained during the upward movement of said lever untilthe axis of the truck 38 reaches the point a, the axis of the pivotalconnection of said lever with the upper end of the pitman 8 reaches thepoint b, and the axis of the pivotal connection of said lever with thelink 13 reaches the point c, and the elbow-lever 14, the draw-bars, theinking-rollers, and the platen are all in the positions shown in Fig. 4,in which position they remain in a state of rest until the pitmanScompletes its upward movementand descends until the several axes justabove referred to arrive at the points ot, b, and c, respectively, ontheir return movement, thereby giving a dwell to the platen equal toonequarter of aprevolution of the crank. This dwell of the platen isobtained by the movement of the lever 10 endwise in an upward directioncaused bythe truck 38 movinginto 34 and the further fact that duringtheupward movement of the pitman 8, after said mentioned axes have reachedthe several points a, b, and c, the link 13 moves about its pivotalconnection to the elbow-lever 14 without moving it from the positionshown in Fig. 4. This is a very important feature of my invention, asthereby the dwell or standstill of the platen is very greatly increased,giving ample time for feeding the sheet. Another important feature of myinvention is the means employed for supporting the platen and its yokeupon the two radius-arms 2l and 23 of different lengths and connectingthe front ends of the draw-bars 18 and the upper ends of the radius-arms21 to a common axis of motion, as the shaft 19, and also mounting thelower ends of the radius-arm 23 upon an eccentric 25, with means foradjusting said eccentric about its axis to rock the platen and yokeabout the axis of the shaft 19 to adjust the impression relative to theupper and lower portions of the typeform.

In Fig. 5, which is a longitudinal section of means I employ to adjustthe platen to regulate the impression relative to the right and leftends of the type-form, in which 2O is the yoke, 39 the platen. 40 is aright and left hand screw-shaft mounted at the middle of its length inbearings in the two ears 4l 41, formed on or secured to the yoke 2O andhaving secured thereon between said bearings a sleeve 42 to preventendwise movement thereof.

The rear face of the yoke 2O has formed therein a rectangular groove 42,which extends from end to end thereof, and the adjacent side of theplaten 39 has formed therein a similar groove 43, but of greater width,and having the two end portions of its bottom inclined toward each end,as shown in Fig. 5. Between the bottoms of the inclined portions of thegroove 43 and the bottom of the groove 42a are fitted two wedge-shapedblocks 44 44, through each of which is bored a circular perforation 45,having a diameter in excess of the diameter of the screw-shaft 40, toeach of which perforations is fitted a quill or sleeve 46, the innerperimeter of which is threaded to fit the threaded portion of saidscrew-shaft 40 and provided at its outer end with the ear or lug 47,through an opening in which the adjusting-screw 48 passes and der oneach side of said ear 47, so that a rotary movement of said screw 48will cause the wedge 44 to be moved outward or inward, according to thedirection in which said screw is revolved. B y this arrangement of thewedgeblocks v44 the screw-shaft 40, the internallythreaded sleeves 46and adjusting-'screws 48, and the radius-arms 21 and 23 for supportingthe platen and its yoke, the draw-bars 18, mounted on the same axis asthe upper ends of the radius-arms 21, the eccentric-pin 25, and theslotted arm 26, with means for clamping said arm in its desired adjustedposition, a perfect adjustment of the platen is obtainable with verymuch less trouble than heretofore.

The platen 39 has formed upon or secured to its lower edge the arms 45?45a in bearings, in which the gripper shaft or bar 46a ismountgripper-fingers 47a, said gripper-bar also having firmly secured toone end thereof the lever 48, to the movable end of which is pivoted oneend of the rod 49, the other end of which is tted to and is movableendwise in the tubular inner end of the handle 50, the tubular end ofwhich is slotted transversely, through which slot the pin 51 is insertedtransversely through the rod 49, said slot and pin acting as a stop tolimit the movement of the rod 49 in said tubular handle in eitherdirection.

The handle 50 is provided with a notch 52, (shown in dotted lines inFig. 2,) which engages a pin 53, set in the outer face of the is screwedinto a threaded hole in the wedgei 44, said screw 48 being provided witha shouled, and has adjustably secured thereto the` the platen andplaten-yoke, I illustrate the IOO left-hand radius-arm 2l, as shown inFig. 1. The rod 49 is provided with a shoulder 54 near its pivotalconnection to the lever 48a, between which and the end of the handleportion said rod is surrounded by the coiled spring 55, which serves topress the gripperfingers 47EL upon the tympan-sheet on the inner face ofthe platen.

The platen may be secured to the platenyoke by any well-known yieldingconnection.

The operation of my invention will be readily understood from theforegoing without further explanation here.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is-

l. In a printing-press,the combination with a fixed bed and a vibratingplaten, an elbowlever and a pair of draw-bars connecting said platen andelbow-lever, of a crank; a pitman operated by said crank; a linkconnected to said elbow-lever; a lever connected at one end to saidpitman and link and fulcrumed by a slotted bearing upon a fixed supportat its other end; and a stationary cam constructed and arranged to actupon said lever to move it endwise during certain portions of itsvibration as and for the purposes described.

2. In a printing-press, the combination with a fixed bed a vibrating andoscillating platen, and radius-arms of two dierent lengths forsupporting said platen, of an elbow-lever; a pair of draw-bars connectedat one end to said elbow-lever, and at their other ends to said platenand to the upper ends of the pair of longest radius-arms by common axes;a crank; a pitman operated by said crank; a link connected to saidelbow-lever; a lever connected at one end to said pitman and link, andfulcrumed by a slotted bearing upon a fixed support at its other end;and a stationary cam constructed and arranged to act upon said lever tomove it cndwise during certain portions of its vibration, as and for thepurposes described.

3. In a printing-press, the combination of a platen-yoke provided with apair of ears projecting from its inner face; a screw-shaft mounted inbearings in said ears so as to be revoluble, but non-movable endwisetherein, and having formed thereon at one end a righthand-threadedportion, and on its other end a left-hand-threaded portion; a platenhaving a rectangular groove formed in the side thereof which is adjacentto said yoke, a section of said groove at each end having its bottominclined or made deeper at its outer end than at its inner end; a pairof wedgeshaped blocks fitted between said inclined surfaces of theplaten-groove and the inner surface of the yoke, and each provided witha cylindrical perforation extending longitudinally therethrough; a pairof internallythreaded sleeves mounted on the threaded portions of saidscrew-shaft and fitted to the perforations of said wedge-shaped blocks,and

each provided with a laterally-projecting ear; and an adjustingscrewmounted in'a bearing in said ear and screwed into said wedgeshaped blockas and for the purpose set forth.

4. In a printing-press,the combination with a vibrating platen, agripper-bar carried by said platen, adjustable gripper-fingers carriedby said bar, and a lever secured to the end of said gripper-bar, ofradius-arms for supporting said platen; the rod 49 pivoted to saidbar-operating lever and provided with the shoulder 54; the tubularhandle 50 iitted to and inclosing one end of said rod 49, and providedwith the notch 52, and with a transverse slot in its tubular end; thepin 5l set in said'rod 49 and projecting into said transverse slot; thepin 50 set in one of said radiusarms and engaged by said notch 52; andthe spring 55 surrounding said rod 49 between the shoulder 54 and theinner end of said handle 50.

5. In a printing-press, the combination of a platen-carrying yoke; aseries of radiusarms pi voted at theirupper ends to said yoke, and attheir lower ends to some fixed portion of the machine, one of saidradius-arms being of less length than the other two; an eccentricpivot-pin forming a bearing for one end of said shorter radius-arm;means for adjusting said eccentric about its axis and clamping it insaid adj usted position; a pair of ears projecting from the inner faceof said yoke; a screw-shaft mounted in bearings in said ears so as to benon-movable endwise, but revoluble therein, and having formed thereonright and left hand screw-threads, at opposite ends thereof; a platencarried by said yoke and having a groove in the face thereof that isadjacent to said yoke, and extending from side to side thereof, asection of said groove at each end having its bottom inclined or madedeeper at one end than at its other end; a pair of wedge-shaped blocksfitted between said inclined surfaces of the platen-groove and the innersurface of the yoke, and each provided with a cylindrical perforationextending longitudinally from end to end thereof; a pair ofinternallythreaded sleeves mounted on the threaded portions of saidscrew-shaft and iitted to the perforations of said wedge-shaped blocks,.

and each provided with a laterally-projecting ear; and anadjusting-screw mounted in a bearing in said ear and screwed into saidwedge-shaped blocks, whereby a perfect adj ustment of the face of theplaten relative to the face of the type-form is obtainable.

AIn testimony whereof I have signed my name to this specification, inthe presence of two subscribing witnesses, 011 this23d day of August, A.D. 1902.

GEORGE W. PROUTY.

Witnesses:

N. C. LOMBARD, J. H. STEvENsoN.

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